A modified d’Aubuisson approach for measuring overflow in side-weir detention basins

Yeonghwa Gwon; Hosoo Lee; Seogyeong Lee; Dongsu Kim; Young Do Kim

doi:10.3741/JKWRA.2024.57.S-1.1187

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2024 Vol.57, Issue 12S Preview Page Next Page

Research Article

A modified d’Aubuisson approach for measuring overflow in side-weir detention basins 개선된 d’Aubuisson식 기반 횡월류 저류지 월류량 측정 기법

31 December 2024. pp. 1187-1199

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Abstract

Estimating the overflow discharge at side weirs and Detention basins is a critical factor in flood management and the design of hydraulic structures. Traditional overflow discharge estimation methods using De Marchi and d’Aubuisson are less accurate under complex flow conditions such as submerged flow, resulting in significant discrepancies between actual and calculated discharge. This study proposes an improved overflow discharge estimation technique, modifying the conventional d’Aubuisson formula. Experiments were conducted in a side weir retention basin using measuring instruments such as radar water level sensors, ADCP, and Image velocimeter under various water level and discharge conditions. The improved formula was applied based on the collected empirical data to estimate the overflow discharge. The results demonstrated that the traditional formulas overestimated the discharge by only considering the overflow depth in submerged flow conditions. However, the proposed formula, which incorporates flow direction and the sign of the discharge, provided more accurate results. This study shows that the improved formula overcomes the limitations of existing methods and offers high reliability even under complex hydraulic conditions. The findings enhance the accuracy of overflow discharge estimation and suggest the applicability of a more precise flow estimation model for flood management and detention basin design.

Keywords

Overflow discharge estimation

d’Aubuisson equation

Submerged flow

Video-based flow measurement

Detention basin

횡월류 저류지 및 위어에서의 월류량 산정은 홍수 관리 및 수리 구조물 설계에 있어 중요한 요소이다. 기존의 De Marchi 및 d’Aubuisson 공식을 이용한 월류량 산정은 잠긴 흐름과 같은 복잡한 흐름 조건에서는 정확도가 떨어지며, 실제 유량과 계산된 유량 간에 큰 차이가 발생하는 문제점이 있다. 본 연구에서는 기존의 d’Aubuisson 공식을 개선하여, 월류량 산정 기법을 제안하였다. 횡월류 저류지에서 레이더 수위계, ADCP, 영상유속계 등의 측정 장비를 사용하여 다양한 수위 및 유량 조건에서 실험을 수행하였으며, 실측 데이터를 기반으로 개선된 공식을 적용하여 월류량을 산정하였다. 실험 결과, 기존 공식들은 잠긴 흐름 조건에서 월류수심만을 고려하여 월류량을 과대 산정하였으나, 제안된 개선 공식은 유속의 방향성 및 유량의 부호까지 반영하여 개선된 결과를 확인할 수 있었다. 이는 기존 월류량 산정 공식이 가진 한계를 극복하고 복잡한 수리학적 조건에서도 높은 신뢰도를 제공할 수 있음을 보여준다. 본 연구는 월류량 산정의 정확도를 향상시키고, 홍수 관리 및 저류지 설계에 있어 보다 정밀한 유량 산정 모델의 적용 가능성을 제시하였다.

키워드

월류량 산정

d’Aubuisson 공식

잠긴 흐름

영상유속 측정

횡월류저류지

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 57
No :12
Pages :1187-1199
Received Date : 2024-10-15
Revised Date : 2024-11-17
Accepted Date : 2024-11-18
DOI :https://doi.org/10.3741/JKWRA.2024.57.S-1.1187

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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